$ git clone -n https://src.fedoraproject.org/rpms/mailimporter.git /var/lib/mock/f42-build-864280-172274/root/chroot_tmpdir/scmroot/mailimporter
Cloning into '/var/lib/mock/f42-build-864280-172274/root/chroot_tmpdir/scmroot/mailimporter'...
$ git fetch origin 3407481ac03e56d456774db3616d409dbb719e7b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mailimporter
 * [new ref]         3407481ac03e56d456774db3616d409dbb719e7b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3407481 24.12.0